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drivers/mfd/tc6387xb.c
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81f7e3824 Initial Release, ... |
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/* * Toshiba TC6387XB support * Copyright (c) 2005 Ian Molton * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. * * This file contains TC6387XB base support. * */ #include <linux/module.h> #include <linux/platform_device.h> #include <linux/clk.h> #include <linux/err.h> #include <linux/mfd/core.h> #include <linux/mfd/tmio.h> #include <linux/mfd/tc6387xb.h> #include <linux/slab.h> enum { TC6387XB_CELL_MMC, }; struct tc6387xb { void __iomem *scr; struct clk *clk32k; struct resource rscr; }; static struct resource tc6387xb_mmc_resources[] = { { .start = 0x800, .end = 0x9ff, .flags = IORESOURCE_MEM, }, { .start = 0, .end = 0, .flags = IORESOURCE_IRQ, }, }; /*--------------------------------------------------------------------------*/ #ifdef CONFIG_PM static int tc6387xb_suspend(struct platform_device *dev, pm_message_t state) { struct tc6387xb *tc6387xb = platform_get_drvdata(dev); struct tc6387xb_platform_data *pdata = dev_get_platdata(&dev->dev); if (pdata && pdata->suspend) pdata->suspend(dev); clk_disable_unprepare(tc6387xb->clk32k); return 0; } static int tc6387xb_resume(struct platform_device *dev) { struct tc6387xb *tc6387xb = platform_get_drvdata(dev); struct tc6387xb_platform_data *pdata = dev_get_platdata(&dev->dev); clk_prepare_enable(tc6387xb->clk32k); if (pdata && pdata->resume) pdata->resume(dev); tmio_core_mmc_resume(tc6387xb->scr + 0x200, 0, tc6387xb_mmc_resources[0].start & 0xfffe); return 0; } #else #define tc6387xb_suspend NULL #define tc6387xb_resume NULL #endif /*--------------------------------------------------------------------------*/ static void tc6387xb_mmc_pwr(struct platform_device *mmc, int state) { struct platform_device *dev = to_platform_device(mmc->dev.parent); struct tc6387xb *tc6387xb = platform_get_drvdata(dev); tmio_core_mmc_pwr(tc6387xb->scr + 0x200, 0, state); } static void tc6387xb_mmc_clk_div(struct platform_device *mmc, int state) { struct platform_device *dev = to_platform_device(mmc->dev.parent); struct tc6387xb *tc6387xb = platform_get_drvdata(dev); tmio_core_mmc_clk_div(tc6387xb->scr + 0x200, 0, state); } static int tc6387xb_mmc_enable(struct platform_device *mmc) { struct platform_device *dev = to_platform_device(mmc->dev.parent); struct tc6387xb *tc6387xb = platform_get_drvdata(dev); clk_prepare_enable(tc6387xb->clk32k); tmio_core_mmc_enable(tc6387xb->scr + 0x200, 0, tc6387xb_mmc_resources[0].start & 0xfffe); return 0; } static int tc6387xb_mmc_disable(struct platform_device *mmc) { struct platform_device *dev = to_platform_device(mmc->dev.parent); struct tc6387xb *tc6387xb = platform_get_drvdata(dev); clk_disable_unprepare(tc6387xb->clk32k); return 0; } static struct tmio_mmc_data tc6387xb_mmc_data = { .hclk = 24000000, .set_pwr = tc6387xb_mmc_pwr, .set_clk_div = tc6387xb_mmc_clk_div, }; /*--------------------------------------------------------------------------*/ static const struct mfd_cell tc6387xb_cells[] = { [TC6387XB_CELL_MMC] = { .name = "tmio-mmc", .enable = tc6387xb_mmc_enable, .disable = tc6387xb_mmc_disable, .platform_data = &tc6387xb_mmc_data, .pdata_size = sizeof(tc6387xb_mmc_data), .num_resources = ARRAY_SIZE(tc6387xb_mmc_resources), .resources = tc6387xb_mmc_resources, }, }; static int tc6387xb_probe(struct platform_device *dev) { struct tc6387xb_platform_data *pdata = dev_get_platdata(&dev->dev); struct resource *iomem, *rscr; struct clk *clk32k; struct tc6387xb *tc6387xb; int irq, ret; iomem = platform_get_resource(dev, IORESOURCE_MEM, 0); if (!iomem) return -EINVAL; tc6387xb = kzalloc(sizeof(*tc6387xb), GFP_KERNEL); if (!tc6387xb) return -ENOMEM; ret = platform_get_irq(dev, 0); if (ret >= 0) irq = ret; else goto err_no_irq; clk32k = clk_get(&dev->dev, "CLK_CK32K"); if (IS_ERR(clk32k)) { ret = PTR_ERR(clk32k); goto err_no_clk; } rscr = &tc6387xb->rscr; rscr->name = "tc6387xb-core"; rscr->start = iomem->start; rscr->end = iomem->start + 0xff; rscr->flags = IORESOURCE_MEM; ret = request_resource(iomem, rscr); if (ret) goto err_resource; tc6387xb->scr = ioremap(rscr->start, resource_size(rscr)); if (!tc6387xb->scr) { ret = -ENOMEM; goto err_ioremap; } tc6387xb->clk32k = clk32k; platform_set_drvdata(dev, tc6387xb); if (pdata && pdata->enable) pdata->enable(dev); dev_info(&dev->dev, "Toshiba tc6387xb initialised "); ret = mfd_add_devices(&dev->dev, dev->id, tc6387xb_cells, ARRAY_SIZE(tc6387xb_cells), iomem, irq, NULL); if (!ret) return 0; iounmap(tc6387xb->scr); err_ioremap: release_resource(&tc6387xb->rscr); err_resource: clk_put(clk32k); err_no_clk: err_no_irq: kfree(tc6387xb); return ret; } static int tc6387xb_remove(struct platform_device *dev) { struct tc6387xb *tc6387xb = platform_get_drvdata(dev); mfd_remove_devices(&dev->dev); iounmap(tc6387xb->scr); release_resource(&tc6387xb->rscr); clk_disable_unprepare(tc6387xb->clk32k); clk_put(tc6387xb->clk32k); kfree(tc6387xb); return 0; } static struct platform_driver tc6387xb_platform_driver = { .driver = { .name = "tc6387xb", }, .probe = tc6387xb_probe, .remove = tc6387xb_remove, .suspend = tc6387xb_suspend, .resume = tc6387xb_resume, }; module_platform_driver(tc6387xb_platform_driver); MODULE_DESCRIPTION("Toshiba TC6387XB core driver"); MODULE_LICENSE("GPL v2"); MODULE_AUTHOR("Ian Molton"); MODULE_ALIAS("platform:tc6387xb"); 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